I can get the machine to boot into failsafe, and I have backed out the last two kernel patches, because my support tech told me too to see if that was the cause of the problem, however that didn't really do anything it's still in this reboot loop.

If I try and get it too boot to single usermode, I get the same results of the constant reboots. Support really doesn't seem to know what else to do, so what I'm wondering is, if I boot to CD-Rom and do a reinstall of Solaris, will that keep all my data or will that format the drives? I'm wondering because we have a ton of data on it and I really don't want to lose it all.

If you have support coverage on that system, you may need to open a SR with Oracle.

I seem to recall from a very long time ago ( > 8 years, while in an earlier incarnation ) that there were some systems whose RAM and OBP were effected by newer OS patches. Patch bundles place much more than only the kernel patches onto a system and those other patch components impart stricter requirements on how other hardware in the box needs to perform for you.

Tech Support can help you examine ALL the system's settings before/after your patching. That sort of an examination is too complex to do in a forum however.

Therein lies the problem. The machine is on a disconnected network, so while I have no problem typing, it would require that I do exactly that. Type everything out to them as they can't pull data off of it remotely.

Matty79 wrote:
Therein lies the problem. The machine is on a disconnected network, so while I have no problem typing, it would require that I do exactly that. Type everything out to them as they can't pull data off of it remotely.

Explorer is a software application you install to the box.
You run its script and it takes all that information for you, then saves everything in a single output file.
Even if it's a deprecated tool, it would still be good enough.

I'm wondering if this could be a firmware problem on the machine itself?

As I tried to say in my first reply...
Yes, software patch bundles do need specific minimum OBP patch levels on certain systems. You haven't yet told anyone here what model your system actually is but when glancing at your device path to the disk drive, I made a guess.
As I also mentioned in my first reply, newer software patch levels can also effect how other hardware components like RAM might work and can suddenly reveal marginal DIMMs that used to work but aren't good enough any more.

If you reinstall Solaris, it will repartition the boot disk which means that you will loose the data stored on those partitions. The safe way is:

1.Backup the file systems that hold your sensitive data using ufsdump to a tape or to a file on disk. Also backup the VTOC on the other disks to a text file.
2. Reinstall Solaris
3. Recreate the file system structure and then restore the backup.

I think you have to remove all the installed kernel patches. You can consult the patch README file for any prerequisites/consequences.